Compilare: user.cpp: In member function ‘Edge EdgeHeap::decapitate()’: user.cpp:54:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(2 * indice + 1 < m_heap.size() && ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~ user.cpp:62:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(2 * indice < m_heap.size()) ~~~~~~~~~~~^~~~~~~~~~~~~~~ user.cpp: In function ‘int main()’: user.cpp:89:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < edges[1].size(); ++i) ~~^~~~~~~~~~~~~~~~~ user.cpp:103:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < edges[nextNode].size(); ++i) ~~^~~~~~~~~~~~~~~~~~~~~~~~ user.cpp:76:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dijkstra.in", "r", stdin); ^ user.cpp:77:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dijkstra.out", "w", stdout); ^